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Demonstrations of the photoelectric effect require the use of ultraviolet light of maximum wavelength 264 nm in order to kick electrons off the surface of copper. From this, estimate the maximum energy of electrons in copper's conduction band. (Take the energy of an electron free in space, all by itself, and standing still as zero.)
(a) Use a computer program to calculate the exact probability of obtaining one or more defectives in a sample of size 100 taken from a lot of 1,000 manufactured products assumed to contain six defectives.
A random sample of 144 with a mean of 300 and a standard deviation of 100 is taken from a population of 5000. Find an interval estimate for µ such that we are 90% confident that the interval includes µ.
hypothesis that the random sample was drawn from a uniform distribution on the interval (0, 1) by carrying out a X2 test of goodness-of-fit at the level
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
a manufacturer of strapping tape claims that the tape has a mean breaking strength of 500 psi. experience has shown
Does the problem need scoping/simplifying to make it achievable? What and how will the variables be measured - what degree of error in the findings is tolerable?
Explain how you could actually "randomly pick a number between 1 and 10." Your method should be such that all 10 numbers have the same chance of being selected.
The Federal Government of Australia uses the cash rate to control the inflation rate in Australia. Is there statistical evidence to support such a policy?
use the standard normal table to find the following probabilitiesa pz lt 1.27b pz gt 0.85c pz lt -2.66d p-3.15 lt z lt
To compile the record chart it is necessary to know the correct average weekly sale to within 1% of its true value. How large a sample size is required?
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
Many complications may accompany type 2 diabetes, including heart disease, eye problems, and nerve damage. A recent study suggests that type 2 diabetes
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